import re
text = 'some A.B.B.R.E.V. here.'
pattern = re.compile(r'\b(?:[a-z]\.){2,}', re.I)
text = pattern.sub(lambda m: m.group().replace('.',''), text)
print(text)
aW1wb3J0IHJlCnRleHQgPSAnc29tZSBBLkIuQi5SLkUuVi4gaGVyZS4nCnBhdHRlcm4gPSByZS5jb21waWxlKHInXGIoPzpbYS16XVwuKXsyLH0nLCByZS5JKQp0ZXh0ID0gcGF0dGVybi5zdWIobGFtYmRhIG06IG0uZ3JvdXAoKS5yZXBsYWNlKCcuJywnJyksIHRleHQpCnByaW50KHRleHQp